Power up
99-145912-A Chapter 5: Power and startup 5-3
To calculate the maximum cable extension, do as follows:
1. Measure the source impedance in the ship installation as shown in
Figure 5-1.
2. Find the resistance per meter (Rwire) for the cable type you are
going to use.
4mm
2
/AWG 11: 4.8 mOhm/m at 55°C
6 mm
2
/AWG 10: 3.8 mOhm/m at 55°C
Other cable types: see the data sheet for the cable.
The length is multiplied by 0.5 because there are two conductors in
the cable.
If the SAILOR 6080 AC/DC Power Supply is used, use R
source
= 0
mOhm.
Examples for using the SAILOR 6080 AC/DC Power Supply:
AWG11
max
=0.5 x (60 mOhm-0)/4.8 mOhm/m = 6.2 m
AWG10
max
=0.5 x (60 mOhm-0)/3.8 mOhm/m = 7.9 m
5.2.2 Power cable of the GMU
An AC power cable for the GMU is included in the delivery.
5.3 Power up
5.3.1 To connect the power cable to the ACU and GMU
1. Connect the positive and negative input terminals to the ship's DC
supply according to DC Input connector on page 4-2.
2. Connect the power plug to DC Input.
3. Connect the power cable to the GMU.
Maximum length 05 Rmax Rsource–Rwire=
Figure 5-2: ACU - to connect power to DC Input
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